Statistics Calculators

Mean / Median / Mode

Core central tendency metrics.

Standard Deviation

Population & sample SD.

Variance

Measure data spread.

Probability

Event probabilities & combos.

Binomial Distribution

PMF & CDF calculations.

Poisson Distribution

Event rate modeling.

Normal Distribution

Z-scores, percentiles, probs.

Linear Regression

Fit line & R² values.

Correlation Coefficient

Pearson & Spearman.

Hypothesis Testing

t-test, z-test, p-values.

Confidence Interval

For mean/proportion.

Sample Size

For desired power.

Percentile

Rank calculations.

Chi-Square Test

Goodness-of-fit & independence.

ANOVA

Compare group means.

Boxplot Stats

Quartiles, IQR, whiskers.

Percent Change

Relative change.

Moving Average

SMA & EMA.

Empirical Rule

68-95-99.7 rule.

Odds Ratio

Association measure.

Z-Score

Standardize any value.

t-Test

One/two sample t-tests.

P-Value

From test statistic.

Skewness

Asymmetry measure.

Kurtosis

Tail heaviness.

Covariance

Joint variability.

Quartiles

Q1, Q2, Q3 from data.

Interquartile Range

Q3 − Q1.

Outlier Detection

IQR & Z-score methods.

Cumulative Distribution

CDF for any distribution.

Probability Density

PDF values.

Bayes' Theorem

Update probabilities.

Statistical Power

1 − β for tests.

Effect Size

Cohen's d, r, etc.

F-Distribution

For ANOVA & variance ratios.